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Differences What are the advantages of each

Front view of Intel Xeon E5 2650 v2

Reasons to consider the
Intel Xeon E5 2650 v2

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Much higher clock speed 2.6 GHz vs 2.3 GHz Around 15% higher clock speed
Much better PassMark (Single core) score 1,652 vs 1,031 More than 60% better PassMark (Single core) score
Much more l3 cache 20 MB vs 16 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
Higher turbo clock speed 3.4 GHz vs 3.2 GHz More than 5% higher turbo clock speed
Much more l3 cache per core 2.5 MB/core vs 1 MB/core 2.5x more l3 cache per core
Lower typical power consumption 77.19W vs 93.44W More than 15% lower typical power consumption
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Water) 3.41 GHz vs 2.6 GHz More than 30% better overclocked clock speed (Water)
Lower annual commercial energy cost 83.22 $/year vs 100.74 $/year More than 15% lower annual commercial energy cost
Lower annual home energy cost 22.89 $/year vs 27.7 $/year More than 15% lower annual home energy cost
Front view of AMD Opteron 6276

Reasons to consider the
AMD Opteron 6276

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Much more l2 cache 16 MB vs 2 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Much better overclocked clock speed (Air) 3.72 GHz vs 2.93 GHz More than 25% better overclocked clock speed (Air)
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration

Benchmarks Real world tests of Xeon E5 2650 v2 vs Opteron 6276

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5 2650 v2
1,800,000 MB/s
Opteron 6276
1,320,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5 2650 v2  vs
Opteron 6276 
Clock speed 2.6 GHz 2.3 GHz
Turbo clock speed 3.4 GHz 3.2 GHz
Cores Octa core 16 core
Socket type
LGA 2011
G34
Is unlocked No No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES

power consumption

TDP 95W 115W
Annual home energy cost 22.89 $/year 27.7 $/year
Annual commercial energy cost 83.22 $/year 100.74 $/year
Performance per watt 8.85 pt/W 6.03 pt/W
Typical power consumption 77.19W 93.44W

bus

Architecture QPI HyperTransport 3.0
Number of links 2 4
Transfer rate 8,000 MT/s 6,400 MT/s
Clock speed 4,000 MHz 3,200 MHz

details

Xeon E5 2650 v2  vs
Opteron 6276 
Threads 16 16
L2 cache 2 MB 16 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 20 MB 16 MB
L3 cache per core 2.5 MB/core 1 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 2 4
Clock multiplier 26 16
Operating temperature Unknown - 75°C Unknown - 55°C

overclocking

Overclocked clock speed 2.93 GHz 3.72 GHz
Overclocked clock speed (Water) 3.41 GHz 2.6 GHz
Overclocked clock speed (Air) 2.93 GHz 3.72 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
Intel Xeon E5 2650 v2
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AMD Opteron 6276
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